a. Branch with flowers and fruits. b. Detached large leaf, abaxial view. c. Base of lamina, abaxial view. d. Node with interpetiolar stipules. e. Umbel of four flowers just opening, subtended by very young lateral umbels. f. Flower bud about to open, subtended by the bract and two bracteoles. g. Staminate flower from above. h. Two stamens from staminate flower, abaxial view, that on right opposite a sepal, that on left opposite a petal. i. Anthers from staminate flower, abaxial view (left) and lateral view (right). j. Gynoecium from staminate flower. k. Pistillate flower from above. l. Petal from pistillate flower, adaxial view. m. Two stamens from pistillate flower, abaxial view, that on left opposite a sepal, that on right opposite a petal. n. Anther from pistillate flower. o. Gynoecium from pistillate flower. p. Apex of style from gynoecium of pistillate flower. q. Samaras, lateral view (left) and adaxial view (right). Scale bar equivalents:
a, b, 4 cm; c, d, 4 mm; e, 5.7 mm; f, 2.7 mm; g, 4 mm; h, 2 mm; i, 1.3 mm; j, 2 mm; k, l, 4 mm; m, 2 mm; n, 1.3 mm; o, 2 mm; p, 1 mm; q, 8 mm. Based on: a, c, d, k–q, Daniel 11025 (MICH); b, Labat et al. 2126 (MO); e–j, Phillipson 4104 (MICH). Drawn by Karin Douthit. © University of Michigan Herbarium.